The Jet Propulsion Laboratory is the lead U.S. center for robotic exploration of the solar system. JPL spacecraft have visited
all known planets except Pluto (a Pluto mission is currently under study for the early part of the next decade)., The Jet
Propulsion Laboratory is the lead U.S. center for robotic exploration of the solar system, and conducts major programs in
space-based Earth sciences and astronomy. JPL spacecraft have visited all of the planets from Mercury to Neptune.